Silicon nitride sintered body and method for producing same
    11.
    发明授权
    Silicon nitride sintered body and method for producing same 失效
    氮化硅烧结体及其制造方法

    公开(公告)号:US5114888A

    公开(公告)日:1992-05-19

    申请号:US612691

    申请日:1990-11-15

    IPC分类号: C04B35/593

    CPC分类号: C04B35/5935

    摘要: Silicon nitride base sintered body consists of: 1 to 20 wt % (as oxides) of at least one of rare earth elements; 0.5 to 8 wt % of V (as V.sub.2 O.sub.5); 0.5 to 8 wt % (as oxides) of at least one of Nb, Ta, Cr, Mo and W; sum of the Va and VIa group elements according to the Periodic Table of the International Version (as oxides) being 1 to 10 wt %; and balance silicon nitride. It has high strength of 690-880 MPa (70-90 kgf/mm.sup.2) and high oxidation resistance both at 1350.degree. C. It is produced by 2 stage gas-pressure sintering in pressurized N.sub.2 atmosphere, primarily at 1700.degree.-1900.degree. C. at 1 MPa (10 atm) or less and secondarily at 1600.degree.-1900 C. at 10 MPa (100 atm) or above.

    摘要翻译: 氮化硅基烧结体由以下组成:1〜20重量%(作为氧化物)的稀土元素中的至少一种; 0.5至8重量%的V(作为V 2 O 5); Nb,Ta,Cr,Mo和W中的至少一种为0.5〜8重量%(作为氧化物) 根据国际版本(作为氧化物)的周期表,Va和VIa族元素的总和为1至10wt%; 并平衡氮化硅。 它在1350℃下具有690-880MPa(70-90kgf / mm2)的高强度和高抗氧化性。它在加压N 2气氛中,主要在1700°-1900℃下通过2级气压烧结 在10MPa(100大气压)以上,在1MPa(10atm)以下,二次在1600〜1900℃。

    Polycarbonate polymer from tetra arylene triphenol
    12.
    发明授权
    Polycarbonate polymer from tetra arylene triphenol 失效
    来自四亚芳基三酚的聚碳酸酯聚合物

    公开(公告)号:US4894432A

    公开(公告)日:1990-01-16

    申请号:US227773

    申请日:1988-08-03

    IPC分类号: C07C39/15 C07C43/23

    CPC分类号: C07C43/23 C07C39/15

    摘要: A triphenol type compound represented by the following formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 independently represent hydrogen, a halogen, a C.sub.1 -C.sub.5 alkyl group or a C.sub.1 -C.sub.5 alkoxy group.The triphenol type compound can be used, as a branching agent, for the production of a polycarbonate comprising (A) a carbonic acid component unit, (B) a divalent phenol component unit, and (C) a triphenol type compound component unit derived from the above-mentioned triphenol type compound. The triphenol type compound unit (C) is used in an amount of 0.01 to 10 mole %, based on the divalent phenol component unit (B) and the intrinsic viscosity [.eta.], determined at 25.degree. C. in methylene chloride, of the polycarbonate is 0.4 to 1.0 dl/g and the glass transition temperature (Tg), determined by a differential scanning type calorimeter is 150.degree. C. to 300.degree. C.

    Triphenol compound
    13.
    发明授权
    Triphenol compound 失效
    三酚化合物

    公开(公告)号:US4778936A

    公开(公告)日:1988-10-18

    申请号:US916099

    申请日:1986-10-07

    CPC分类号: C07C43/23 C07C39/15

    摘要: A triphenol type compound represented by the following formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 independently represent hydrogen, a halogen, a C.sub.1 -C.sub.5 alkyl group or a C.sub.1 -C.sub.5 alkoxy group.The triphenol type compound can be used, as a branching agent for the production of a polycarbonate comprising (A) a carbonic acid component unit, (B) a divalent phenol component unit, and (C) a tripenol type compound component unit derived from the above-mentioned triphenol type compound. The triphenol type compound unit (C) is used in an amount of 0.01 to 10 mole %, based on the divalent phenol component unit (B) and the intrinsic viscosity [.eta.], determined at 25.degree. C. in methylene chloride, of the polycarbonate is 0.4 to 1.0 dl/g and the glass transition temperature (Tg), determined by a differential scanning type calorimeter is 150.degree. C. to 300.degree. C.

    摘要翻译: 由下式表示的三酚型化合物:其中R 1,R 2,R 3,R 4,R 5和R 6独立地表示氢,卤素,C 1 -C 5烷基或C 1 -C 5烷氧基。 三酚类化合物可用作生产聚碳酸酯的支化剂,其包含(A)碳酸组分单元,(B)二元酚组分单元,和(C)衍生自 上述三酚型化合物。 基于二元酚组分单元(B)和在二氯甲烷中在25℃下测定的特性粘度η,三酚类化合物单元(C)的使用量为0.01至10摩尔% 聚碳酸酯为0.4〜1.0dl / g,由差示扫描型量热计测定的玻璃化转变温度(Tg)为150〜300℃。

    Process and apparatus for preparation of phenols
    14.
    发明授权
    Process and apparatus for preparation of phenols 失效
    苯酚的制备方法和装置

    公开(公告)号:US4334108A

    公开(公告)日:1982-06-08

    申请号:US164147

    申请日:1980-06-30

    CPC分类号: B01J4/001 C07C37/08 Y02P20/52

    摘要: Disclosed is a process for the preparation of phenols which comprises reacting an .alpha.-hydroxyalkyl-substituted aromatic compound and/or an .alpha.,.beta.-unsaturated alkyl-substituted aromatic compound with hydrogen peroxide in the presence of an acid catalyst, in which hydrogen peroxide is diluted with a diluent, especially acetone, so that the volume is at least 10 times the original volume, and the diluted hydrogen peroxide is supplied in a divided manner to at least two portions of a reaction vessel or the diluted hydrogen peroxide is scattered by sprinkling into the reaction vessel. According to a preferred embodiment, the diluted hydrogen peroxide is continuously supplied to the gas phase in the reaction vessel from a scattering device which is similar to but separate from a scattering device for supplying the starting aromatic compound, particularly, a product formed by oxidizing an isopropyl aromatic compound with molecular oxygen.According to this process, the efficiency of utilization of hydrogen peroxide is increased and a phenol of high quality can be obtained in a high yield with a high safety.

    摘要翻译: 公开了一种制备酚的方法,其包括在酸催化剂存在下使α-羟基烷基取代的芳族化合物和/或α,β-不饱和烷基取代的芳族化合物与过氧化氢反应,其中过氧化氢是 用稀释剂,特别是丙酮稀释,使其体积为原始体积的至少10倍,稀释的过氧化氢以分开的方式供应至反应容器的至少两个部分,或者稀释的过氧化氢通过喷洒而分散 进入反应容器。 根据优选实施方案,将稀释的过氧化氢从反应容器中的气相连续地供给到与用于供给起始芳族化合物的散射装置相似但是分开的散射装置,特别是通过氧化 异丙基芳族化合物与分子氧。 根据该方法,提高了过氧化氢的利用效率,高安全性地获得了高质量的苯酚。

    Process for preparation of peroxides
    15.
    发明授权
    Process for preparation of peroxides 失效
    过氧化物的制备方法

    公开(公告)号:US4266081A

    公开(公告)日:1981-05-05

    申请号:US944271

    申请日:1978-09-21

    摘要: A process for the preparation of peroxides by condensation reaction of a tertiary organic hydroperoxide with a tertiary alcohol, which is characterized in that zinc chloride is present as a catalyst in an amount of at least 1% by weight based on the tertiary alcohol, is disclosed. This process can be advantageously applied to continuous manufacture of peroxides, and according to this process, peroxides can be obtained in high yields.

    摘要翻译: 公开了通过叔有机氢过氧化物与叔醇的缩合反应来制备过氧化物的方法,其特征在于氯化锌作为催化剂以基于叔醇为至少1重量%的量存在。 。 该方法可以有利地应用于过氧化物的连续制造,并且根据该方法,可以高产率获得过氧化物。

    Laminated capacitor, printed circuit board, decoupling circuit, and high-frequency circuit
    16.
    发明授权
    Laminated capacitor, printed circuit board, decoupling circuit, and high-frequency circuit 有权
    层压电容器,印刷电路板,去耦电路和高频电路

    公开(公告)号:US06795294B2

    公开(公告)日:2004-09-21

    申请号:US10706137

    申请日:2003-11-13

    IPC分类号: H01G4228

    CPC分类号: H01G4/30 H01G4/232

    摘要: A laminated capacitor has an end surface pitch Pe, which defines an interval between adjacent first and second external terminal electrodes disposed on end surfaces having shorter sides in a body of a laminated capacitor, which is equal to or less than about 0.9 times of a side-surface pitch Ps, which defines an interval between adjacent first and second external terminal electrodes disposed on side surfaces having longer sides, in order to enhance the effect of magnetic-flux cancellation at the end surfaces and to reduce the equivalent series inductance of the whole laminated capacitor.

    摘要翻译: 叠层电容器具有端面间距Pe,其限定了在层叠电容器的主体中具有短边的端面上设置的相邻的第一和第二外部端子电极之间的间隔,其等于或小于侧面的约0.9倍 表面间距Ps,其限定了设置在具有较长边的侧表面上的相邻的第一和第二外部端子电极之间的间隔,以增强端面处的磁通消除的影响并且减小整个的等效串联电感 层压电容器。

    Sintered body of silicon nitride and its manufacture
    17.
    发明授权
    Sintered body of silicon nitride and its manufacture 失效
    氮化硅烧结体及其制造

    公开(公告)号:US5045513A

    公开(公告)日:1991-09-03

    申请号:US393726

    申请日:1989-08-15

    IPC分类号: C04B35/584 C04B35/593

    CPC分类号: C04B35/5935

    摘要: A sintered body of silicon nitride with high density, strength, toughness, and hardness, which can be used for a structural part of an engine, etc. The sintered body of the invention includes 80 to 94 wt % Si.sub.3 N.sub.4, 2 to 10 wt % Mg compound calculated in MgO equivlent, and 2 to 10 wt % Y compound calculated in Y.sub.2 O.sub.3 equivalent. The Si.sub.3 N.sub.4 contains 5 to 40% .alpha.-phase. The sintered body is manufactured in the following steps: (a) mixing powdery Si.sub.3 N.sub.4 with a Mg compound and a Y compound in the above proportions, and then molding the mixture in which the Si.sub.3 N.sub.4 powder contains 80% or more .alpha.-phase and its grains are 1 .mu.m or less in diameter on average; (b) performing primary sintering at 1,600.degree. C. or less in an atmospher of nitrogen or of an inert gas at 20 atm or less; and (c) performing secondary sintering at 1,400.degree. to 1,600.degree. C. in an atmosphere of nitrogen or of an inert gas at 300 atm or more.

    摘要翻译: 具有高密度,强度,韧性和硬度的氮化硅烧结体,其可用于发动机的结构部件等。本发明的烧结体包含80〜94重量%的Si 3 N 4,2〜10重量% 镁化合物按MgO计算,和2〜10重量%的Y化合物按Y2O3当量计算。 Si3N4含有5〜40%的α-相。 该烧结体按以下步骤制造:(a)以上述比例混合粉末状Si 3 N 4与Mg化合物和Y化合物,然后将其中Si 3 N 4粉末含有80%以上的α-相及其晶粒的混合物 平均直径1米以下; (b)在大气压的氮气或20atm以下的惰性气体中,在1600℃以下进行初次烧结; 和(c)在氮气气氛中或在大气压为300atm以上的惰性气体中,在1400℃〜1600℃进行二次烧结。

    Epoxy resin
    18.
    发明授权
    Epoxy resin 失效
    环氧树脂

    公开(公告)号:US4954603A

    公开(公告)日:1990-09-04

    申请号:US362289

    申请日:1989-06-06

    摘要: Disclosed is a heat-resistant flame-retardant epoxy resin composition comprising a halogen-containing epoxy resin obtained by reacting a trifunctional epoxy compound having a specific structure with a halogenated bisphenol in the presence of a catalyst. Furthermore, a novel specific trifunctional epoxy compound is disclosed, which is valuably used for the production of the above-mentioned halogen-containing epoxy resin.

    摘要翻译: 公开了一种耐热阻燃环氧树脂组合物,其包含在催化剂存在下使具有特定结构的三官能环氧化合物与卤化双酚反应获得的含卤素的环氧树脂。 此外,公开了一种新颖的具体三官能环氧化合物,其有价值地用于制备上述含卤素的环氧树脂。